Is there a native component for the Floating actio

问题:

My question revolves around the Floating action button that was introduced in Android Material Design.

There are many library offering this component on GitHub as:

1. Android-floating-action-button
2. FloatingActionButton
3. CircularFloatingActionMenu
4. Fab
5. Floating-action-button

But my question is:

Is there a native component with the last release of android.support.vX that was built for Floating action button?

Components such as :

• android.support.v7.cardview
• android.support.v4.widget.DrawerLayout
• android.support.v7.widget.RecyclerView
• ...

回答1:

Today (29/05/2015) it is officially avaiable with the new Material Design support Library.

Just add this dependency to your build.gradle

compile 'com.android.support:design:22.2.0'

Add this view to your layout:

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="end|bottom"
    android:src="@drawable/ic_done" />

And use it:

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        //TODO
    }
});

回答2:

Not yet, there have been hints that we will see it in the next support lib.

回答3:

You can use the class md-fab on a md-button then add a span with something like a plus sign inside of the md-button. Also there are other md-fab classes like md-fab-bottom-right which might help you out. Also you can use an md-icon inside your md-button

<md-button class="md-fab"><span class="glyphicon glyphicon-plus" /></md-button>